US2555443A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radio apparatus employing slot antenna
Assignee: GTE Sylvania Inc
•
Filing: 1948-06-08
•
Granted: 1951-06-05
•
Expires: 1968-06-08
Abstract
No abstract record available.
Inventors
- 👤 Norman L Harvey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:03
CPC Classifications
H; H01; H01Q; H01Q13/00; H01Q13/10; H03; H03H; H03H2/00; H03H2/005; H03H2/006
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2129852A
Cited
US2125969A
Cited
US2190712A
Cited
US2241119A
Cited
US2415094A
Cited
US2234293A
Cited
US2414266A
Cited
US2404745A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-06-04 | 1954-12-04 | 1955-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-04 | 1958-12-04 | 1959-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-04 | 1962-12-04 | 1963-06-05 | $7700.00 | Window Closed / Lapsed |